Improving the Understanding of the Response to Vitamin D Supplementation

ClinicalTrials.gov ID: NCT01465178

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Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

It is the investigators hypothesis that the current method of evaluating vitamin D status, measuring circulating 25-hydroxy vitamin D is not providing the full metabolic picture, and is therefore inadequate. The investigators liken this concept to the evolution of cholesterol where initially, total cholesterol was the only measurement, and have since determined the importance of HDL, LDL and triglycerides in evaluating patient status. Similarly, the investigators feel measurement of other vitamin D components such as sulfated vitamin D, circulating vitamin D3 and 3-epi 25-hydroxy vitamin D will offer more comprehensive information about a patient's vitamin D status. It is our overarching hypothesis that a "vitamin D assay panel," will enhance understanding of vitamin D status. It is our expectation that the enhanced understanding based on improved measurement capability will ultimately translate to improved definition of vitamin D status and need for supplementation on an individual level.

Study identification

NCT ID: NCT01465178
Recruitment status: Completed
Study type: Interventional
Phase: Phase 3
Lead sponsor: University of Wisconsin, Madison; Other
Enrollment: 62 participants

Conditions and interventions

Conditions

Vitamin D Deficiency

Interventions

cholecalciferol Dietary Supplement
Placebo Dietary Supplement

Dietary Supplement

Eligibility (public fields only)

Age range: 50 Years to 100 Years
Sex: Female
Healthy volunteers: Accepts healthy volunteers

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date: Dec 2011 (Type not available)
Primary completion: Dec 2014 (Actual)
Completion: Dec 2014 (Actual)
Last update posted: Nov 25, 2016

2011 – 2014

United States locations

U.S. sites: 1
U.S. states: 1
U.S. cities: 1

Facility	City	State	ZIP	Site status
University of Wisconsin	Madison	Wisconsin	53705	—

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows: Public field values for ClinicalTrials.gov record NCT01465178, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do: No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from: Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh: Last update posted Nov 25, 2016 · Synced Nov 15, 2026